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148 Chapter 6 Prepare Hardware for Maintenance or Upgrades
P0993133 03
Base Function Tray Maintenance Procedures
The base function tray contains the core processing components. To prepare for base function tray
removal, perform a software and hardware shutdown. Use the Unified manager interface to
properly deactivate and isolate the Business Communications Manager from the network. Set up
the server for maintenance, as described in “Shut down the system hardware” on page 146.
Use this procedure only under the following conditions:
• to replace the MSC, modem, memory DIMMs, battery, PEC III, or WAN (if applicable)
• to replace the base function tray. Remove the components from the old base function tray and
install in the replacement base function tray.
Use the flow chart shown in Figure 79 as a summary guide to replace the base function tray.
Danger: Electrical shock warning. Disconnect the power cord, telephone cables and
network cables before opening the computer. Read and follow installation instructions
carefully.
Caution: Use only a Nortel Networks approved replacement. Contact your account
representative for the current list of approved replacement parts.
Warning: Protect the hardware components against damage from electro-static
discharge. Always wear a ground wriststrap before you handle components. Always place
the components in static-free container.